
<div style="float:left;display:block;">
<div style="background:#ff0000;width:800px;height:600px;filter:alpha(opacity=50);display:block;overflow:hidden;">
	<div style="background:#00ff00;width:80%;height:80%;">
		<div style="background:#0000ff;width:50%;height:50%;filter:alpha(opacity=100);position:relative;">
		</div>
	</div>
</div>
</div>